From 03183a1946a72439aee4399dd3d0566c38644034 Mon Sep 17 00:00:00 2001
From: roxblnfk <roxblnfk@ya.ru>
Date: Tue, 8 Sep 2026 16:33:35 +0400
Subject: [PATCH] [DowngradePhp81] Handle ArrowFunction in
 DowngradeNeverTypeDeclarationRector

A "never" return type on an arrow function is invalid below PHP 8.1, yet the rule only subscribed to Function_, ClassMethod and Closure, so fn(): never => ... was left untouched. Add ArrowFunction to the subscribed node types; the decorator already accepts it.

Assisted-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 .../Fixture/arrow_function_never.php.inc          | 15 +++++++++++++++
 .../DowngradeNeverTypeDeclarationRector.php       |  5 +++--
 2 files changed, 18 insertions(+), 2 deletions(-)
 create mode 100644 rules-tests/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector/Fixture/arrow_function_never.php.inc

diff --git a/rules-tests/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector/Fixture/arrow_function_never.php.inc b/rules-tests/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector/Fixture/arrow_function_never.php.inc
new file mode 100644
index 00000000..f5d11194
--- /dev/null
+++ b/rules-tests/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector/Fixture/arrow_function_never.php.inc
@@ -0,0 +1,15 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp81\Rector\FunctionLike\DowngradeNeverTypeDeclarationRector\Fixture;
+
+$callable = fn (): never => throw new \RuntimeException();
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp81\Rector\FunctionLike\DowngradeNeverTypeDeclarationRector\Fixture;
+
+$callable = fn () => throw new \RuntimeException();
+
+?>
diff --git a/rules/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector.php b/rules/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector.php
index f7d958f7..4c0203f9 100644
--- a/rules/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector.php
+++ b/rules/DowngradePhp81/Rector/FunctionLike/DowngradeNeverTypeDeclarationRector.php
@@ -5,6 +5,7 @@
 namespace Rector\DowngradePhp81\Rector\FunctionLike;
 
 use PhpParser\Node;
+use PhpParser\Node\Expr\ArrowFunction;
 use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Function_;
@@ -31,7 +32,7 @@ public function __construct(
      */
     public function getNodeTypes(): array
     {
-        return [Function_::class, ClassMethod::class, Closure::class];
+        return [Function_::class, ClassMethod::class, Closure::class, ArrowFunction::class];
     }
 
     public function getRuleDefinition(): RuleDefinition
@@ -60,7 +61,7 @@ function someFunction()
     }
 
     /**
-     * @param ClassMethod|Closure|Function_ $node
+     * @param ArrowFunction|ClassMethod|Closure|Function_ $node
      */
     public function refactor(Node $node): ?Node
     {